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Stone block 80 × 60 × 50 with a dovetail lewis hole 20 → 30 × 14, 30 deep

What is a lewis hole? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: lewis hole, dovetail hole stone, piedra con agujero de castañuela, Werkstein mit Wolfsloch

Exact dimensions. True size, with no printing tolerance added.

length
80.0 mm
width
60.0 mm
height
50.0 mm

Notes

  • 80 × 60 × 50 block (the stone) with a dovetail hole in its top: 20 mm wide at the surface widening to 30 mm at 30 mm depth, 14 mm the other way — the undercut the lewis locks into.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Stone block 80 × 60 × 50 with a dovetail lewis hole 20 → 30 × 14, 30… size chart

dimensionvalue
block80 × 60 × 50 mm
hole at surface20 × 14 mm
hole at bottom30 × 14 mm
depth30 mm

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Henry T. Brown (1868, public domain)Five Hundred and Seven Mechanical Movements — scan on archive.orgwebPublisher's page; dimensions are facts
507movements.comBrown's movement No. 493: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

lewis-stone-block-80x60x50block, top at z = 0, hole along YSTEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=lewis-stone-block-80x60x50

Stone block 80 × 60 × 50 with a dovetail lewis hole 20 → 30 × 14, 30 deep, isometric render of a generated part
Render of lewis-stone-block-80x60x50 from the free STEP; not to scale.

Fits with

Lewis (three-piece stone lifter in a dovetail hole), isometric render of a generated part
Lewis (three-piece stone lifter in a dovetail hole)4 sizes★ 1 file

Questions

What is a lewis hole?

80 × 60 × 50 block (the stone) with a dovetail hole in its top: 20 mm wide at the surface widening to 30 mm at 30 mm depth, 14 mm the other way — the undercut the lewis locks into.